Car-dook



B. McG. PEARSON. CAR DOOR LOCK AND RELEASE. APPLICATION FILED JULY I9, ms.

1,337,261 Patented Apr. 20, 1920.

2 SHEETSSHEET 1.

M K I 512;:

B. McG. PEARSON.

CAR DOOR LOCK AND RELEASE. APPLICATION FILED JULY 19, 1918.

1,337,261 Patented Apr. 20, 1920.

2 SHEETS-SHEET 2.

W 4 5555 31 1 we 11 foz 5 @0420. %d/10/7 7/ GHQ-0114243 DNITED STATES PATENT OFFICE.

BIGALO MCGUIRE PEARSON, OF GREENVILLE, MISSISSIPPI.

CAR-DOOR 1160K AND RELEASE.

Application filed July 19, 1918.

To all whom itmay concern:

Be it known that l, BIGALO l l. PEARSON, a citizen of the United States, residing at Greenville, in the county of Washington and State of Mississippi, have invented certain new and useful Improvements in Car-Door Locks and Releases, of which the following is a specification.

This invention relates to car doors, and more especially to those which swing horizontally slightly in addition to moving or gewise; and the object of the same is to provide means for looking or fastening the door in closed position and for releasing the door when it is desired to open it.

A further object is to provide unitary means for locking the door against lateral movement by swinging it horizontally into contact with the sill.

It is well known to railroad men that the doors of freight cars or grain cars often become so firmly wedged in their guides (especially the guides for their lower edges) by the pressure from within the car, that it is practically impossible to slide them open after they are unlocked. By my invention 1 provide means whereby the lower guide is movable and presses the door toward the sill when it is moved in one direction, while it entirely releases the door when it is moved in the opposite direction. Details are set forth in the following specification and claim, and attention is invited to the drawings, wherein Figure 1 is a side elevation showing a portion of a freight car, with its door closed and locked by my improvement Fig. 2 is an enlarged sectional detail through the hanger,

Fig. 3 is a perspective detail of one of the guides,

Fig. 1 is a sectional detail through the guide, showing a portion of the lower edge of the door and the sill,

Fig. 5 is a sectional detail of the lever and the fastening device for the hasp.

1n the drawings the letter W designates the wall of a freight or grain car, and D is the door slidably mounted on overhead hangers H so as to move edgewise along said wall against a stop S to expose an opening which is not seen in Fig. 1. This is the usual opening above the door sill S and through which opening the car is loaded andunloaded. WVhen the door is moved to closed position as seen in Fig. 1, its inner edge rests Specification of Letters Patent.

Patented Apr. 20, 1920.

Serial No. 245,714.

against a cleat C. he door is supported in either position by the hangers H, and its lower edge is usually mounted within a guide along the bottom of the door opening. My present invention consists in moving this guide by mechanism which will be described below.

The hanger H which I prefer to employ is best seen in Fig. 2. This consists of a round rail 1 carried by a series of brackets 2 which are secured to the wall it so that the rail shall stand out beyond the same some little distance, and grooved wheels and 4: pivoted respectively above and below the rail at the points 5 and 6 within a casting 7 which stands upright and is secured as at 8 to the outer face of the door D. By this means the latter is supported from the rail so that it can travel along the same as it is pushed open or closed, and at the same time its lower edge may swing a little out from the car and in toward it. However, other forms of hangers may be employed.

Coming now to the details of the present invention, 1 provide a number of box-like guides 10 whereof three are shown in 'Fig. 1, each having a flange 11 at its inner side through which fastening devices may be passed into the car wall W, and each having openings 12 at its top and bottom for the passage of an upright bolt 13 whose upper extremity is rounded or beveled. upon its inner face as indicated at let. The body of this belt is provided with teeth 15, and within the guides 10 is disposed a gear wheel 16 meshing with said teeth. A shaft 17 is journaled through the side walls of all the guides 10, and the several gear wheels 16 are fast on the shaft. To one end of the lat ter, preferably near the cleat G, is fixed a lever 18 by which the shaft and all the gear wheels may be turned simultaneously. When now the door D has been shoved to closed position against'the cleat C, the lever 18 is moved upward and all the bolts 13 are caused to rise through their several guides, with the result that their beveled upper ends 1 1 pass outside the lower edge of the door D and the latter is forced inward against the sill S as the relative position of parts necessitates. When it is desired to again open the door, the lever 18 is grasped and turned downward so that the shaft is rotated in the opposite direction and the gear wheels cause the several bolts 13 to descend. This draws their upper ends out of engagement with the door D, and the latter may swing outward from the car wall and out of contact with the sill S, when it can be readily moved aside by hand. If the pressure of the freight or grain in the car tends to force the latter outward and away from the sill, this pressure itself will swing the door out of contact with device such as the pin 23 shown in Fig. 5

or a padlock or seal. In this case the free end of the lever 18 is also provided with an opening which passes over the staple, and when the parts are assembled as seen in Fig. 5, the hasp is locked so that the door cannot be slid and the lever is locked so that the bolts cannot be moved. Therefore the single fastening device typified by the pin 28 in Fig. 5 serves the double purpose of locking the door closed and locking the bolts 13 against movement and thus locking the door against swinging. .However, the means for locking the hasp and for locking the shaft against rotation might be separate if preferred.

The foregoing description and the drawings have reference to what may be considered the preferred, or approved form of my invention. It is to be understood that I may make such changes in construction and arrangement and combination of parts, materials, dimensions, et cetera, as may prove expedient and fall within the scope of the ap ended claim.

Iaving thus fully'described my invention, what I claim as new and desire to secure by Letters Patent,is 2- In combination with a car having a door opening and a doorswingably and slidably supported upon said car, box like guides carried by said car below the door opening, a rotatable shaftrpassing through all of said guides, gear wheels keyed upon said shaft within said guides, upright bolts vertically slidable through said guides and having teeth upon one surface'which mesh with said gear wheels, the upper ends of said bolts being rounded, means for oscillating said shaft, whereby the gear wheels will move said bolts vertically, thus permitting the rounded upper ends of the bolts to engagethe lower surfaces of the door for forcing the 3211118111130 a binding engagement with the car, as and for the purposes set forth.

In testimon whereof I affix m si nature in presence of two witnesses;

BIGALO MOGUIRE PEARSON.

I'Vitnesses C. KIETER, FRANK BARNES. 

